AD 2010-07-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A300 B2-1C | Airworthiness Directives; Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203 Airplanes |
Unsafe Condition
Mal-phasing between the hydraulic motors of the THSA induced excessive loads into the gear train, leading to bearing collapse, severe tooth damage, and disconnection of hydraulic motors, resulting in THSA gearbox jamming and loss of THSA control.
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Required Actions
Perform an on-airplane phasing inspection and magnetic plug inspection for metal particles on the THSA drain plug, using detailed inspection methods. Replace the THSA with a serviceable unit if necessary. Repeat inspections at specified intervals based on findings.
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Compliance Time
Within 4,000 flight hours after the last THSA overhaul or within 250 flight hours after the effective date of this AD, whichever occurs later.
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Affected Aircraft
Airbus Model A300 B2-1C, B2K-3C, B2-203, B4-2C, B4-103, and B4-203 airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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